GCMS blank analysis report for sample AE12735, June 2002

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Log sheet recording sample numbers, drip rates, pH levels, and other processing metrics for multiple environmental samples.

NYC-WTC_000015135–000015158

Folder label: “GCMS X 6/3/02 A 6/7/02”

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NYC 9/11 Public Portal Document LDLary sed.cI Lotpounu Kepor L

Data File C:\MSDCHEM\1\DATA\0 6 0 7 0 2\LBA.D Vial: 10 Acq On 7 Jun 2002 3:55 pm Operator: Sample gc/ms scan 6/3 Inst : Instrumen Mise Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\060302.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L ********************************************************************* Peak Number 1 Methylene Chloride Concentration Rank 2

R.T. EstConc Area Relative to ISTD R.T. 3.71 3.12 ug/L 2167800 1,4-dichlorobenzene-d4 9.89 Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 Methylene Chloride 84 CH2C12 000075-09- 2 Methylene Chloride 84 CH2C12 000075-094[2 95 3 Methylene Chloride 84 CH2C12 000075-09- 2 90 4 Methylene Chloride 84 CH2C12 000075-09- 2 83 Abundance Scan 107 (3.708 min): LBA.D (-94) (-) m/z 49.10 100N 00% 49 84

5000

■ • ■ i ■ • ■ ■ i 1 ■ ■ ■ i ■ ■ ■ ■ i ■ ■ ■ ■ । ... ........ ..... ............. 88 3.40 3.60 3.80 4.00 70 0 TTITTTTTTTTTTT - m/z 84.00 81.46% nz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #12327: Methylene Chloride 49

84 5000 3.40 3.60 3.80 4.00 m/z 86.00 54.37% 14 18 24 2831 353841 88 01 52 70 Tmmmmmdmmmmmapmammath ■I■l " l. niz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111039: Methylene Chloride 49 84 3.40 3.60 3,80 4.00 ' ‘ 5000 m/z 51.05 31.11%

2831 3538 43| 52 57 88 Of TTunmmmpHu [Tir. t ■ i. ■ । ■ ■ ■ > 67 71 । 77 ।■ t N'1'! " "I"' miz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111041: Methylene Chloride ‘ ■ i ■ ■ ■ ■ i 1 ■ ■ ■ i • ■ ■ ■ i ■ • • ' i 49 3.40 3.60 3.80 4.00 m/z 47.00 18.83% 5000

2629 41 46 | ,!>2 59 65 73 77 84

88 P 0 TTT ITHTTii i. i. । ■ i 111111111 , i > | n 111111111 IT—amuoumf I TH । ■ 1111111 ■ ■ i ' ■ ' ■ i ■ ■ ■ ■ i ■ ■ ■ ■ i ■ ■ ■ ■ i n/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 3.40 3.60 3.80 4.00

LBA.D 060302.M Mon Jun 10 11:27:12 2002 Page 4

NYC-WTC_000015142

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NYC-WTC_000015142Source: NYC Law Department, mirrored locally

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